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Summary of Changes in Accumulated Other Comprehensive Income (Loss) by Component (Detail) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Mar. 31, 2020 | Mar. 31, 2019 | Mar. 31, 2020 | Mar. 31, 2019
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Balance, beginning of period |  |  | $ 102,330 |
Net change related to other comprehensive income (loss) | $ 2,931 | $ 748 | 3,016 | $ 989
Balance, end of period | 114,501 | 94,864 | 114,501 | 94,864
Derivatives |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Balance, beginning of period | (6) | 113 | 0 | 173
Unrealized gains (losses), net of tax | (46) | 31 | (50) | 146
Tax expense (benefit) included in provision for income taxes | (2) | 2 | (1) | 7
Amounts reclassified from accumulated other comprehensive income (loss) | 10 | (64) | 8 | (239)
Net change related to other comprehensive income (loss) | (36) | (33) | (42) | (93)
Balance, end of period | (42) | 80 | (42) | 80
Derivatives | Revenue |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Reclassification adjustments for (gains) losses | 12 | (66) | 9 | (246)
Investments |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Balance, beginning of period | 1,645 | (297) | 1,488 | (850)
Unrealized gains (losses), net of tax | 3,504 | 711 | 3,666 | 1,267
Tax expense (benefit) included in provision for income taxes | (1) | (1) | 0 | (17)
Amounts reclassified from accumulated other comprehensive income (loss) | 4 | 3 | (1) | 67
Net change related to other comprehensive income (loss) | 3,508 | 714 | 3,665 | 1,334
Cumulative effect of accounting changes | 0 | 0 | 0 | (67)
Balance, end of period | 5,153 | 417 | 5,153 | 417
Investments | Other Income (Expense), Net |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Reclassification adjustments for (gains) losses | 5 | 4 | (1) | 84
Translation adjustments and other |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Balance, beginning of period | (1,894) | (1,829) | (1,828) | (1,510)
Net change related to other comprehensive income (loss) | (541) | 67 | (607) | (252)
Balance, end of period | (2,435) | (1,762) | (2,435) | (1,762)
Accumulated other comprehensive income (loss) |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Balance, beginning of period | (255) | (2,013) | (340) | (2,187)
Net change related to other comprehensive income (loss) | 2,931 | 748 | 3,016 | 989
Cumulative effect of accounting changes | 0 | 0 | 0 | (67)
Balance, end of period | $ 2,676 | $ (1,265) | $ 2,676 | $ (1,265)

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